Question

如果我使用Hibernate继承实体，我可以轻松地尝试只加载我需要的子类，如下所示

SELECT p FROM Product p WHERE TYPE(p) = ?1

尝试使用queryDSL实现相同的查询：

QProduct.product.instanceOfAny(clazz)

但我得到以下异常

Caused by: java.lang.IllegalArgumentException: Parameter value [Product] did not match expected type [java.lang.Integer (n/a)]

查询querydsl生成的

是

SELECT count(product)
FROM Product product
WHERE product.class = ?1  // this should be TYPE(product) = ?1

我的恩惠

@Entity
@Table(name = "product")
@Inheritance(strategy=InheritanceType.JOINED)
public abstract class Product {

    ...

完整堆栈跟踪（针对类似情况但不同的类名称）：

Caused by: java.lang.IllegalArgumentException: Parameter value [BasketDiscount] did not match expected type [java.lang.Integer (n/a)]
    at org.hibernate.jpa.spi.BaseQueryImpl.validateBinding(BaseQueryImpl.java:874)
    at org.hibernate.jpa.internal.QueryImpl.access$000(QueryImpl.java:80)
    at org.hibernate.jpa.internal.QueryImpl$ParameterRegistrationImpl.bindValue(QueryImpl.java:248)
    at org.hibernate.jpa.internal.QueryImpl$JpaPositionalParameterRegistrationImpl.bindValue(QueryImpl.java:337)
    at org.hibernate.jpa.spi.BaseQueryImpl.setParameter(BaseQueryImpl.java:674)
    at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:198)
    at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:49)
    at com.mysema.query.jpa.impl.JPAUtil.setConstants(JPAUtil.java:55)
    at com.mysema.query.jpa.impl.AbstractJPAQuery.createQuery(AbstractJPAQuery.java:128)
    at com.mysema.query.jpa.impl.AbstractJPAQuery.count(AbstractJPAQuery.java:79)
    at org.springframework.data.jpa.repository.support.QueryDslJpaRepository.findAll(QueryDslJpaRepository.java:125)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:442)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:427)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:381)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    ... 94 more

Answer 1

在querydsl github存储库中讨论并解决了这个问题，

和@Timo mentions修复将使用版本3.6.2

应该在3.6.2中提供

querydsl instanceof导致错误查询hibernate类型（1）

1 个答案: